HELP PLEASE! and give out a good explanation! Which of the following best describes the primary cause of wave formation?
A. tidal fluctuations
B. tsunamis
C. gravitational pull of the moon
D. wind

Can you me with this i really appreciate it

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

110 g of water (specific heat = 4.184 j/g c) and 100 g of a metal sample (specific heat = 0.397 j/g c) are heated from 25 degrees c to 75 degrees c. which substance required more thermal energy?